Zooming in with camera (Physical Camera) change the exposure?

[TKIO]

Hi,

I think that's something I noticed in past with VRay Next or the previous... Don't quite remember which one.
Anyways... I wonder if anyone ever experienced that and let me know why zooming in/out with the camera changes the exposure or brightness? Not really sure which one but you can see that something is wrong.
If I get even closer, the render turns black as if the exposure was set to 0 or something.

In any case and in my opinion, it's definitely not a desire effect.

https://player.vimeo.com/progressive...4cbe5c0f9bfcc8

Best,

Jacques.

[damaggio]

There’s a setting there in the camera you need to check but I’m away from computer now. Look for Specify Focus option

[TKIO]

Thank you damaggio!
I reckon "Specify Focus" is for DOF, right? I don't use DOF for that camera so am not sure that's what causing the issue.

I also noticed that if I change the "zoom factor" directly in VRay physical camera, it doesn't change the exposure... Neither the focal length affects it.

Cheers,

Jacques.

[damaggio]

Sorry Jacques, I rarely use a physical camera and this "Specify Focus" I learned from the Razorcrest lectures found here.....https://www.youtube.com/watch?v=CPwz...4jfqwL&index=3

Someone from Chaos should give you a better response. I'll keep watching the post

[hermit.crab]

This should shed some clarity.

[TKIO]

Thanks a lot Aleksandar!
I checked the Maya doc and that section with exposure/distance explanation doesn't exist and I didn't know it was happening in real life neither.

Cheers,

Jacques.